Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 07/10/2023   10:23:14   (  -0.01,-136.99) (  -0.41,-135.28)  195.74                80
 07/11/2023   22:45:09   (   0.01,-136.98) (  -0.78,-140.58)  409.27                80
 07/12/2023   22:29:04   (   0.01,-136.97) (   0.23,-136.04)  106.46                80
 07/14/2023   10:50:50   (  -0.01,-136.95) (   0.97,-141.31)  495.86                80
 07/15/2023   10:29:25   (  -0.01,-136.94) (  -0.04,-136.77)   19.31                80
 07/17/2023   22:32:34   (   0.01,-136.91) (  -0.12,-137.54)   72.07                80
 07/18/2023   22:16:29   (   0.01,-136.89) (   0.89,-133.01)  442.89                80
 07/20/2023   10:35:35   (  -0.01,-136.86) (   0.30,-138.27)  160.36                80
 07/21/2023   10:19:30   (  -0.01,-136.85) (  -0.72,-133.74)  354.44                80
 07/22/2023   22:38:44   (   0.01,-136.82) (  -0.50,-139.03)  252.56                80
 07/23/2023   22:22:39   (   0.00,-136.80) (   0.52,-134.50)  262.06                80